Home / 317,811.88-438,118.50-222,021.28

Finding the Fourth Proportional to 317,811.88, 438,118.50 and 222,021.28

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Solution

The fourth proportional to 317,811.88, 438,118.50 and 222,021.28 is: 306,066.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,811.88 : 438,118.50 = 222,021.28 : x
  2. Step 2: Convert to fraction form
    317,811.88/438,118.50 = 222,021.28/x
  3. Step 3: Cross multiply
    317,811.88x = 438,118.50 × 222,021.28
  4. Step 4: Simplify right side
    317,811.88x = 97,271,630,161.68
  5. Step 5: Solve for x
    x = 97,271,630,161.68/317,811.88
  6. Step 6: Final answer
    x = 306,066.69

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.